Add java21-features module: runnable demos and captured output for the ankurm.com java21-features article

2026-10-20 17:13:59 +00:00
parent 5a076c826f
commit c3cc57f482
33 changed files with 354 additions and 0 deletions
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+/** Fails to compile on purpose: a pattern switch over a sealed type must cover every permitted subtype. */
+public class NonExhaustive {
+    sealed interface S permits A, B {}
+    record A() implements S {}
+    record B() implements S {}
+    static String f(S s) { return switch (s) { case A a -> "a"; }; }
+    public static void main(String[] args) { }
+}